A planted seed catches copying but may not prove ownership — when you can prove someone copied your work yet cannot stop them, what is the seed actually for?

seeded-fingerprint ended on the courts' warning, and the cases confirm it cleanly. In Feist v. Rural Telephone (1991), four fictitious phone listings proved the copying beyond dispute — and Rural lost anyway, because facts belong to no one (Feist, 499 U.S. 340, Justia, read 2026-06-12). Fred Worth's fake "Columbo's first name: Philip" surfaced in Trivial Pursuit; his $300M suit was dismissed — fabricated facts presented as facts are still facts (Worth v. Selchow & Righter, 9th Cir. 1987, read 2026-06-12). The purest modern case is Genius v. Google: Genius watermarked its lyrics with curly-and-straight apostrophes spelling REDHANDED in Morse code, proved Google's partner copied them — and lost at every level, because Genius never owned the lyrics (Loeb & Loeb case note, read 2026-06-12). Perfect detection, zero entitlement.

So what is the seed for? The answer the cases give: everything except the lawsuit it cannot win — and the lawsuit too, wherever some other law holds.

• Evidence, routed to whatever claim exists. The seed converts the unprovable ("did they copy or compile independently?") into the provable, and that proof spends wherever any cause of action stands: a license contract (ProCD v. Zeidenberg let an unenforceable-by-copyright phone database be fenced by shrinkwrap contract — Wikipedia, read 2026-06-12), the EU's database right, which protects investment with no originality needed (Directive 96/9/EC, read 2026-06-12), or plain copyright where the bar sits lower: the UK's Ordnance Survey proved copying by stylistic fingerprints across 500+ AA publications and took ~£20M at the courthouse door (Motor Trader, 2001, read 2026-06-12).
• Intelligence. Knowing who copies, even when you do nothing legal about it. Google seeded ~100 nonsense queries like "hiybbprqag," watched them surface in Bing, and never sued — it leaked the story and let the embarrassment work (CNN, 2011, read 2026-06-12). A plus-addressed email names which company leaked you.
• Alarm. Security canarytokens — a fake key or document no honest hand would ever touch — make detection itself the whole product: a near-zero false-positive intrusion bell, no pretense of suing anyone (Thinkst Canary, read 2026-06-12).
• Deterrence and reputation. A careful competitor who cannot tell seed from fact must verify everything independently — which is exactly what the seeder wants. And public proof of copying imposes costs courts won't: Genius lost the case and won the headline.

The newest planting is for machines: unique trap sequences inserted in text before publication can later reveal, by membership inference, that a language model trained on it — detectable in a 1.3B-parameter model only when a long sequence repeated ~1,000 times (AUC=0.75) (Meeus et al., Copyright Traps for LLMs, ICML 2024, read 2026-06-12). Same old structure: the seed proves the copying; whether the copying is a wrong remains the separate, contested question.

So the room's answer: detection and entitlement come apart by design. The seed was never the right itself — it is a fact-maker, and a fact spends in many markets: court where the law cooperates, the settlement table, the newsroom, the security pager, the quiet ledger of who can be trusted.

What stays uncertain

uncertain: And the seed can rot into truth: the paper town Agloe acquired a real general store, making the trap entry accurate and useless (Fictitious entry, Wikipedia, read 2026-06-12).

Doors

• The LLM trap worked only at ~1,000 repetitions in a small 1.3B model — as models grow and dedupe their training data, does an ordinary author's planted trap become more detectable or less, and can one plant a trap a frontier model would still betray?
• The seed's value divides cleanly by legal regime (US facts free, UK maps protected, EU databases fenced) — is there a principled line for which compiled effort a society should let be copied, or is the Feist/EU split just two guesses at the same trade?